MATLAB Creating Graphical User Interfaces

10 Lay Out a Programmatic UI

Property Values Description

Visible off, on. Default is

off

• Indicates whether the context menu is
  currently displayed. While the context menu
  is displayed, the property value is on; when
  the context menu is not displayed, its value is
  off.


• Setting the value to on forces the posting of
  the context menu. Setting to off forces the
  context menu to be removed. The Position
  property determines the location where the
  context menu is displayed.

For a complete list of properties and for more information about the properties listed in

the table, see Uicontextmenu Properties.

Create the Context Menu Object

Use the uicontextmenu function to create a context menu object. The syntax is

handle = uicontextmenu('PropertyName',PropertyValue,...)

The parent of a context menu must always be a figure. Use the Parent property to

specify the parent of a uicontextmenu. If you do not specify the Parent property, the

parent is the current figure as specified by the root CurrentFigure property.

The following code creates a figure and a context menu whose parent is the figure. At this

point, the figure is visible, but not the menu.

fh = figure('Position',[300 300 400 225]);

cmenu = uicontextmenu('Parent',fh,'Position',[10 215]);

Note“Force Display of the Context Menu” on page 10-77 explains the use of the

Position property.

Add Menu Items to the Context Menu

Use the uimenu function to add items to the context menu. The items appear on the

menu in the order in which you add them. The following code adds three items to the

context menu created above.